Metallic door.



110.747.149. PATENTED DEC. 15', 1903. C. DAHLSTROM. METALLIC DOOR.

APPLICATION FILED JAN, 7l 1903.

NO MODEL. A 2 SHEETS-SHEET l.4

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PATENTED DEG. 15, 1903.

C. DAHLSTROM.

METALLI@ DUUR.

APPLICATION FILED JAN, 7, 190s.

2 SHEETS-SHEET 2.

N0 MODEL.

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#Lneawed /Q/ ms Nonms versus co. Puorowmo., WASHINGTON, n. c,

llnirrnn Freres Patented December 15, 1903.

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METALLTEC DOO..

SPECIFICATION forming part of Letters Patent No. 747,149, dated`December 15, 190,3. i Application filed January 7, 1908. Serial No.138,134. (No model.)

To rtf/Z whom, t W1/tyi concern:

Be it known that I, CHARLES DAHLsTRoM, a citizen of the United States,residing at Jamestown, in the county of Chautauqua and State ofNew York,have invented certain new and useful Improvements in Metallic Doors, ofwhich the following is a specification.

My invention relates to metallic doorsgand the object thereof is toprovide a compara-V tively inexpensive and exceedingly light but durableand rigid door which is air-tight and weatherproof.

Another object is to devise a door of this character which can be madeornamental, which is seamless on one side and in appearance can be madeto resemble any of the common styles of panel-doors, and which, owing toits peculiar construction, is lireproof and sound-proof.

Anotherobject is to so construct my improved door that the large diesheretofore used in shaping the metal sheets for this` purpose aredispensed with and the sheets rolled 'into the proper shape with lesspower and greater facility, and consequently with less time and expense.

Other objects will be apparent from the detail description oft-heinvention which Will be presently given.

The invention consists of the new and novel construction of adoor formedof sheet metal and having an invisible seam or seams and which isconstructed of two thicknesses.

of metal providing stiles, panels, and rails to resemble as near as maybe any common panel-door constructed of wood. y

This invention is susceptible to many changes in form, size,andconnection of metal sheets or place of" connection of the saine, asIdo not wish to confine myself tothel exact construction and arrangementherein described, and shown in the accompanying drawings, but holdmyself at liberty to make such changes as fairly lie within the scopeof.

4e is a vertical section taken on line w w, Fig. 5. Fig. 5 is ahorizontal section taken on line a: x, Fig. Il. Fig. 6 is an enlargedhorizontal section taken on line y y, Fig. l. Fig. '7 is an enlargedhorizontal section taken on line z e', Fig. l. Figs. 8, 9, lO, and llare horizontal sections taken through the panels of doors, showingmodified forms of my invention.

Referring to the drawings in detail, like numerals of reference refer tolike parts in the several figures.

My improved door is formed in its preferred construction of two metalsheets 1 and 2, both extending the full length of the door. The sheetlis provided centrally with a panel depression or formation 3, arrangedto extend the fulllength thereof and havingitsdeflningwalls 4.ornamentally `formed to represent a molding. On opposite sides of thesaid panel depression or formation the sheet is bent at right angles toform the' side edges l5 of the door. Itis then bent inwardly orrecurved, as at 6, to form the hollow Stiles? and is next arranged toform receding defining-Walls S, which represent moldings similar tothose formed by the defining-walls 4 on the opposite side of the door,the edges of the sheet finally recurving or terminating in lips 9, ex#

tending into the hollow Stiles to form channels to interlock with theedges of the metal sheet 2, as will be presently described. The metalsheetl 2 cooperates with the depressed panel portion 3 of the sheet l toform the complete panel. The sheet 2 is of a width somewhat greater thanthe panel depression 3 and hasits edges recurved, as at 10, to formchannels, which receive the lips 9 of the sheet l, thus forming verticalseams in the stile, which are invisible from the outside, .and providinga door having the appearance of being formed of seamless sheet metal. Bymeans of this construction the panel. depres# sion 3 and ornamentaldefining-walls 4 and 8, as well as the Stiles, can be rolled into thedesired outline with ease and great facility and the sheet 2conveniently connected thereto, the Whole forming an air-tight double`sheetmetal door through which neither smoke nor hot air can pass, asthe one side thereof is roo formed in one integral piece without seam orcrevice of any kind.

Between the metal sheet 2 and the depressed panel portion of the sheet 1a fillingsheet 11 of asbestos or any other material of like nature isinterposed, and in the hollow stiles ground asbestos or any othersuitable material may be inserted to make the door absolutely fireproofand sound-proof. This filling need not necessarily be of anon-combustible nature, as other material combustible in the open air,but non-combustiblein an air-tight inclosure, has by experiment beenfound more satisfactory, as it is not so liable to act upon the steeland cause corro-` sion. i/Vhen a sound-proof door only is desired, anyother suitable material may be If desired, the panel may be providedwith moldings 15 to further ornament the same, and when used they arepreferably riveted to the door, each rivet passing through both moldingsand the metal sheets 1 and 2. These moldings tie the two sheets togetherand prevent vibration of the same, particularly on wide doors.

The upper and lower rails 16 17, respectively, are each formed of asingle sheet of metal bent upon itself to form a channeled member,having its sides 18 separated to correspond with the thickness ofthestiles, and thus present an even surface therewith. The horizontalportions 19 of the rails are provided with extensions 2O 21, which bearagainst the open upper and lower ends of the stiles, respectively. Thesides of these rails are of a length to snugly fit between the stiles,and the upper ends are made to recede andform the upper and lowerornamental defining-walls 22 23, respectively, of the panel. Thesedefining-walls terminate in recurved lips 24, separated by a space 25,corresponding to thel thickness ofthe panel, thus providing a suitablebearing for the rails against said panel. At regular intervalsseparators 2b' are provided between the side walls and the recurved.lips of the rails, and passing through said separators, the sides andrecurved lips of the rails, and the panel are rivets 27, which securelytie the parts together and greatly stiffen the door at this point.

The upper and lower ornamental definingwalls of the panel are fitted tothe side defining-walls 4 and 8, and the recurved lips of the rails 1617 are somewhat shorter than the sides thereof, so as to fit thenarrowest space between the side defining-walls to permit of bearingfirmly against the panel.

The hollow rails are also filled with ground asbestos or other suitablematerial. If desired, the rails may be brazed, welded, or otherwisesecured to the metal sheets 1 and 2, forming the body of the door, andthe rivets dispensed with; but I find the riveting of the parts, inaddition to welding the abutting edges, to be the most satisfactory.

The defining-walls of the panel by being offset and curved greatlystiffen the door and permits the use of a much lighter grade of metalwithout effecting the rigidity of the door, which would otherwise beimpossible. Any desired number of moldings or intermediate rails may besecured to the panel to produce any desired design; but such is notnecessary in a door of this type, as it would unnecessarily increase itsweight.

In the modification shown in Fig. 8 the stiles and panel of the door or,in other words, the body of the door is also formed of two sheets ofmetal 28 29, each sheet forming a stile 30 and one side of the panel 31.One edge of each sheet is recurved to form a channel and terminates in alip 32 at the inner edge of the stile forming part thereof, and theother end thereof terminates in a recurved portion forming a channel 33,in which the adjacent lip of the connecting-sheet is secured.

In thel modication shown in Fig. 9 the stiles and panel forming the bodyof the door are formed of a single sheet of metal arranged to have oneedge thereof recurved to forma channel and terminate in a lip 34 at theinner edge of one stile to extend into the same and its other edgerecurved to form a channel 35 at the junction of the panel with saidstile, the said lip being secured in the channel 35 to form a seaminvisible from the outside of the door.

In the modification shown in Fig. 10 the panel and stiles forming thebody of the door are formed of two sheets of metal. The edges of thepanel portion 36 on one side of the door is doubled upon itself, as at37, and then recurved, as at 38, and carried laterally and directed toform the stiles, which are provided at their inner edges with achanneled portion 39, formed at the edges of the sheet, said channeledportion receiving the doubled portions 37 of the panel portion 36 andalso the edges of the panel portion 40, forming,r the other side of thepanel, thus securely holding the two sides of the panel together.

In the modification shown in Fig. 11 the stiles and panel are alsoformed of two sheets of metal. The stiles and one side of the panel areconstructed of one sheet and the other side ofthe panel is formed of theother sheet. The edges of one panel portion 41 are recurved, as at 42,to form channels and then carried laterally and outwardly to form theornamental defining-wall 43 of the panel and IOO IIO

finally directed to form the hollow stiles. The edges of the sheetterminate in channels 44 of a size sufficiently large to receive thechanneled edges of the panel portion 41. The metal sheet forming theopposite panel portion 45 has its edges secured in the channeled edgesof the panel portion 4l.

By preference a sheet of asbestos or other suitable material isinterposed between the two panel portions in each modified construction.

Having thus described my invention, what I claim is- 1. A door formed ofsheet metal and having one sheet provided with a panel formation servingas one side of the panel and having its sides recurved to form thestiles of the door and its edges oppositely recurved to form channels,and another sheet forming the other side of the panel and having itsedges recurved to interlock with the recurved edges of thefirst-mentioned sheet.

2. A door formed of sheet metal and having one sheet provided with apanel formation serving as one side of the panel and being recurved onopposite sides of the panel formation to form the stiles of the door,and another sheet forming the other side of the panel and having itsside edges connected with the side edges of the first-mentioned sheet.

3. A door formed of sheet metal and'having one sheet provided with apanel formation serving as one side of the panel and being recurved onopposite sides of said panel formation to form the stiles of the door, asecond sheet forming the other side of the panel and having its sideedges connected with the side edges of the first-mentioned sheet, and athird and forth sheet forming the upper and lower rails of the door,respectively, said lastrnentioned sheets being doubled upon themselvesto form channeled rails into which the upper and lower ends of the panelare fitted.

4. A door formed of sheet metal having a panel, and stiles bounding thesides of the panel, the edges of the metal sheets forming said panel andstiles being connected at the junction of the two, andl end rails eachformed of a separate sheet of metal bent upon itself to form a channeledrail into which the ends of the first-mentioned metal Vsheets arefitted, said last-mentioned sheets forming the end rails bounding theupper and lower ends of the panel.

5. A door formed of sheet metal having a panel, and stiles bounding thesides of said panel, the edges of the metal sheets forming said paneland stiles being connected at the junction of the two, end rails eachformed of a separate metal sheet bent upon itself to form a channel andhaving the edges of the sheet recurved parallelwith the sides of thechannel between which the panel is'fitted, separators between the sidewalls of the channeled rails and the recurved edges thereof, and rivetspassing through the rails, separators and the panel to securely fix therails to the latter.

6. A door formed of sheet metal and having its side walls connected byan edge wall, and a reinforcing-strip secured to the inner face of theedge wall, said edge wall being provided with an aperture to permit thedoorhinge to be secured to said reinforcing-strip.

7. A door formed of sheet metal bent upon itself to form edge walls andhaving its side walls separated, and a reinforcing-strip secured to theinner face of the edge wall, the latter having a perforation exposingsaid reinforcing-strip to permit the door-hinge to be secured thereto.

8. A door formed of sheet metal bent upon itself to form hollow stilesand panel formations on opposite sides of the door, said panelformations beingseparated slightly and at least one of said panelformations .being formed integrally with the stiles, and a filling sheetor lining interposed between said panel formations.

9. A door formed of sheet metal comprising one sheet forming the stilesand one side of the panel, a second sheet serving as the other side ofthe panel and having connection with the first-mentioned sheet by avertical seam at the junction of the stiles to said panel, and a sheetof asbestos interposed between the two walls of the panel.

lO. A double sheet-metal panel-door having its stiles and one side ofthe panel made seamless and having an invisible interlocking seam at thejunction of one stile with the other side of the panel.

ll. A double sheet-metal panel-door having hollow stiles and the edgesof the metal sheet or sheets forming the door, provided IOO withchanneled edges interlocked on the inside of the hollow stile or stiles.

l2. A double sheet-metal'door having the edges of the metal sheet orsheets forming the same connected by an invisible interlocking seam.

13. A door formed of sheet metal and having one sheet arranged to formone side, the edges, and a portion of the other side of the door, andasecond sheet forming the remaining portion of the last-mentioned sideof the door, both sheets having interlocking channeled or recurvededges.

14. A double sheet-metal door having two sheets of metal forming a paneland stiles on opposite sides of the panel, said sheets havinginterlocking channeled or recurved edges connected at the point ofmeeting of the stiles with the panel on one side of the door.

l5. A double sheet-metal door constructed to form hollow stiles and twoopposing panel portions, the door having a vertical seam on one side atthe junction of one panel portion with the adjacent hollow stile.

16. A double sheet-metal door comprising IIO a sheet of metal extendingthe full length and In testimony whereof I have hereuntoA afthe fullWidth thereof to form one side and fixed my signature in the presence oftwo subxo having recurved side marginal portions formscribing Witnesses.ing a portion of the other side of the door, and 5 a second metal sheetextending the full length l CHARLES DAHLSTROM of the door and beingsecured by means of Witnesses: invisible interlocking seams to the edgesof ALFRED L. FURLOW, the first-mentioned sheet. CLEMENT B. JONES.

